30 research outputs found
AlteraçÔes morfofisiolĂłgicas em folhas de Coffea arabica L. cv. "Oeiras" sob influĂȘncia do sombreamento por Acacia mangium Willd
Produtividade e bienalidade da produção de cafezais adensados, sob diferentes doses de N e K
Poda de raĂzes e adubação para crescimento do cafeeiro cultivado em colunas de solo
Crescimento, fotossĂntese e composição mineral em genĂłtipos de Coffea com potencial para utilização como porta-enxerto
Anatomic and physiological modifications in seedlings of Coffea arabica cultivar Siriema under drought conditions
Crescimento de raĂzes dos capins aruana e tanzĂąnia submetidos a duas doses de nitrogĂȘnio
Low-lying single-particle structure of 17C and the NâŻ=âŻ14 sub-shell closure
The first investigation of the single-particle structure of the bound states of 17C, via the C transfer reaction, has been undertaken. The measured angular distributions confirm the spin-parity assignments of and for the excited states located at 217 and 335 keV, respectively. The spectroscopic factors deduced for these states exhibit a marked single-particle character, in agreement with shell model and particle-core model calculations, and combined with their near degeneracy in energy provide clear evidence for the absence of the sub-shell closure. The very small spectroscopic factor found for the ground state is consistent with theoretical predictions and indicates that the strength is carried by unbound states. With a dominant valence neutron configuration and a very low separation energy, the excited state is a one-neutron halo candidate